package com.atguigu.gulimall.auth.controller;

import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.constant.AuthServerConstant;
import com.atguigu.common.exception.BizCodEnum;
import com.atguigu.common.utils.R;
import com.atguigu.common.vo.MemberEntity;
import com.atguigu.gulimall.auth.feign.MemberFeignService;
import com.atguigu.gulimall.auth.feign.ThirdPartyFeignService;
import com.atguigu.gulimall.auth.vo.UserLoginVo;
import com.atguigu.gulimall.auth.vo.UserRegistVo;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.context.properties.bind.BindResult;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;
import org.springframework.web.servlet.mvc.support.RedirectAttributesModelMap;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

/**
 * @Author: WackyBoy
 * @Date: 2021/7/9 9:48
 */

@Controller
public class LoginController {

    @Autowired
    ThirdPartyFeignService thirdPartyFeignService;

    @Autowired
    StringRedisTemplate redisTemplate;

    @Autowired
    MemberFeignService memberFeignService;


    @ResponseBody
    @GetMapping("/sms/sendcode")
    public R sendCode(@RequestParam("phone") String phone) {
        // 1. 接口防刷
        // 2. 验证码再次校验
        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIEX + phone);
        if(!StringUtils.isEmpty(redisCode)) {
            long l = Long.parseLong(redisCode.split("_")[1]);
            if(System.currentTimeMillis() - l < 60000) {
                // 60秒内不能再法
                return R.error(BizCodEnum.VALID_SMS_CODE_EXCEPTION.getCode(), BizCodEnum.VALID_SMS_CODE_EXCEPTION.getMsg());
            }
        }
        String code = UUID.randomUUID().toString().substring(0, 5);
        String substring = code + "_" + System.currentTimeMillis();

        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIEX + phone, substring, 10, TimeUnit.MINUTES);

        thirdPartyFeignService.sendCode(phone, code);

        return R.ok();
    }


    /**
     * // TODO: 重定向携带数据, 利用session原理, 将数据房子啊session中, 只要跳到下一个页面取出这个数据以后, session里面的数据就会删掉
     * // TODO: 分布式下的session逻辑
     * @param vo
     * @param result
     * @param redirectAttributes: 模拟重定向携带数据
     * @return
     */
    @PostMapping("/register")
    public String regist(@Valid UserRegistVo vo, BindingResult result, RedirectAttributes redirectAttributes) {
        if(result.hasErrors()) {
//            Map<String, String> errors = new HashMap<>();

            Map<String, String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));
            redirectAttributes.addFlashAttribute("errors", errors);
            // 校验出错转为注册页
            // Request method `POST` not support
            // 用户注册  ->  /register[post] --> 转发/reg.html(路径映射默认都是get方式访问的)
//            return "reg";
            return "redirect:http://auth.gulimall.com/reg.html";
        }

        // 真正注册, 调用远程服务进行注册
        // TODO: 1. 校验验证码
        R r = memberFeignService.regist(vo);
        if(r.getCode() == 0) {
            // 成功

            return "redirect:http://auth.gulimall.com/login.html";
        } else {
            Map<String, String> errors = new HashMap<>();
            errors.put("msg", r.getData(new TypeReference<String>(){}));
            redirectAttributes.addFlashAttribute("errors", errors);
            return "redirect:http://auth.gulimall.com/reg.html";
        }

        // 注册成功回到首页, 回到登录页
//        return "login";

    }


    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes redirectAttributes, HttpSession session) {

        // 远程登录
        R login = memberFeignService.login(vo);
        if(login.getCode() == 0) {
            MemberEntity data = login.getData("data", new TypeReference<MemberEntity>() {});
            // TODO: 1. 默认发的令牌，session=asda。作用域是当前域: (解决子域session共享问题)
            // TODO: 2. 使用JSON的序列化方式来序列化对象数据到redis中
            session.setAttribute(AuthServerConstant.LOGIN_USER, data);
            return "redirect:http://gulimall.com";
        } else {
            Map<String, String> errors = new HashMap<>();
            errors.put("msg", login.getData("msg", new TypeReference<String>(){}));
            redirectAttributes.addFlashAttribute("errors", errors);
            return "redirect:http://auth.gulimall.com/login.html";
        }


    }



//    发送一个请求直接跳转一个页面, SpringMVC viewController : 将请求和页面映射过来
    @GetMapping("login.html")
    public String loginPage(HttpSession session) {
        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
        if(attribute == null) {
            // 没登陆
            return "login";
        } else {
            return "redirect:http://gulimall.com";
        }
    }
//
//    @GetMapping("reg.html")
//    public String regPage() {
//
//        return "reg";
//    }

}
